http://graciegirlakagg.deviantart.com/art/ocean-land-and-sky-209543688
http://www.biochar.org/joomla/index.php?option=com_content&task=view&id=67&Itemid=7&limit=1&limitstart=1
http://sciencewithme.com/learn-about-fossil-fuels/
90. What are (2) major variables shaping Earth's
weather patterns? temperature and moisture levels
http://agrippinglife.wordpress.com/2012/03/23/new-weather-patterns-same-old-complainers/
91. Humans are changing the planet's radiative
balance by increasing atmospheric concentrations of
greenhouse gases through activities such as burning
fossil fuels. This process is changing what (2)
variables?
global temperatures
and moisture levels
http://www.thedailygreen.com/environmental-news/latest/global-warming-facts-myths-0409
Today, coal provides 55% of the U.S. electricity supply and
the U.S. imports more than half of the oil it consumes.
http://geothermal.marin.org/GEOpresentation/sld112.htm
Slide 112 of 122, © 2000 Geothermal Education Office
http://www.energytomorrow.org/blog/2012/october/life-without-fossil-fuels-all-the-things-wed-miss
http://www.energytomorrow.org/blog/2012/november/no-oil-or-natural-gas-a-less-beautiful-world
http://www.energytomorrow.org/blog/2012/september/no-oil-no-natural-gas-a-colder-world
92.What will determine the fraction of man-made
CO2 emissions that will remain in the atmosphere
and alter Earth's radiative balance?
the rate at which land and ocean sinks take up carbon
http://thedailyocean.blogspot.com/2011/06/land-ho-or-sight-for-sore-eyes.html
93. What is considered the most important
anthropogenic greenhouse gas? CO2
http://bradleydibble.authorsxpress.com/2012/11/28/visualizing-carbon-dioxide-might-help/
94. In recent decades, only about half of the CO2
added to the atmosphere by human activities has
stayed in the atmosphere. The rest has been taken
up and stored where?
in the oceans
and in
terrestrial
ecosystems
http://school.homeoclass.ru/carbon-dioxide
/
95. The basic processes through which land and
ocean sinks (storage reservoirs) take up carbon are
well understood, but there are many questions.
What (3) questions do scientists have still?
1. How much anthropogenic carbon can these sinks
absorb?
2. Which sinks are taking up the largest shares?
3. How sensitive are these sinks to various changes
in the environment?
http://www.celebratebig.com/hawaii-big-island/i6-hawaii-south-point-honaunau-bay-puuhonua-o-honaunau-mango-sunset-bb-lyman-farms-wawaloli-beach.htm
http://www.interactiveoceans.washington.edu/story/Carbon+Cycle
96. The residence time of carbon varies widely
among different reservoirs. On average a carbon
atom spends about 5 years in the atmosphere, 10
years in terrestrial vegetation, and 380 years in
intermediate and deep ocean waters. Carbon can
remain locked up in ocean sediments or fossil fuel
deposits for millions of years.
97. Oceans and land ecosystems thus serve as
both sources and sinks for carbon.
Gigatons of Carbon and the Carbon Cycle. Source: IPCC 2004
98. It would take about 500 years for all
ocean water to come into contact with the
atmosphere.
99. Forests take up CO2 through what features?
photosynthesis, stored carbon in plant
tissue, forest litter, and soils
Nantahala National Forest
http://www.fs.usda.gov/recarea/nfsnc/recreation/horseriding-camping/recarea/?recid=48634&actid=30
100.What reasons do scientists give for forests
taking up a rising share of CO2 from fossil fuel
combustion in the 1980s and 1990s?
Scientists believe that this occurred mainly because
forests in the Northeastern United States and
similar areas in Europe, many of which were clearcut or used for agriculture in the 1700s and 1800s,
have been growing back with the decline of
agriculture in the region.